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Finding the Fourth Proportional to 318,557.73, 477,615.16 and 140,967.87

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Solution

The fourth proportional to 318,557.73, 477,615.16 and 140,967.87 is: 211,353.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,557.73 : 477,615.16 = 140,967.87 : x
  2. Step 2: Convert to fraction form
    318,557.73/477,615.16 = 140,967.87/x
  3. Step 3: Cross multiply
    318,557.73x = 477,615.16 × 140,967.87
  4. Step 4: Simplify right side
    318,557.73x = 67,328,391,784.91
  5. Step 5: Solve for x
    x = 67,328,391,784.91/318,557.73
  6. Step 6: Final answer
    x = 211,353.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.